CoffeelakeSiliconPkg:Redirect ConfigBlockLib path

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2318



Change reference path of ConfigBlockLib to IntelSiliconPkg for Coffeelake.

Signed-off-by: TinaX Y Chen <tinax.y.chen@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Cc: Ethan Tsao <ethan.tsao@intel.com>